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How can I write this function (image) in Latex?
This should lay a sufficient foundation:
\documentclass{article}
\setlength{\parindent}{0pt}% Just for this example
\begin{document}
$f \colon \{0,1\}^N \rightarrow \{0,1\}^M$
$f \colon \{0,1\}^N \mapsto \{0,1\}^M$
\end{document}
You can change the spacing around : (or \colon) as needed, perhaps using f~\colon~.
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first of all i'm new in latex
I wanted to ask if there is a way where i can enlose a text like a code like here in stack overflow thank you very much.
Ive searched here but i dont really know what to seek or how to ask something like this.
I don't know what do you mean by code like text. But you can use \verbatim to display some code like the following if this is what you wanted:
\begin{verbatim}
for i in range(1, 20):
print i
else:
print "the loop is done"
\end{verbatim}
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In my latex document I have use the tag \sout , to strike out some texts, in many places. Is there a one-shot way to delete the text in all the occurrences of the tag along with the tag ?
You could redefine the way \sout works by including the following in your document preamble:
\renewcommand{\sout}[1]{\unskip}
Here's an example illustrating the effect:
\documentclass{article}
\usepackage{ulem}% http://ctan.org/pkg/ulem
\begin{document}
Here is some \sout{text} stuff.
\renewcommand{\sout}[1]{\unskip}
Here is some \sout{text} stuff.
\end{document}
If you're using an editor that allows for searching with regular expressions, then you could do a find for the regular expression \\sout\{[^\}]+\} (note that this is untested) and replace with an empty string or space.
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I would know which are the margins (in meters) top,right,bottom and left, default assigned for bookclass. there is a command or a way to know them?
It depends on whether you want to include the header/footer and possibly even if you use twoside document. Perhaps the following minimal working example can be a start:
\documentclass{book}
\usepackage{layouts}% http://ctan.org/pkg/layouts
\begin{document}
\pagevalues
\end{document}
uses the layouts package to produce
All units are printed in points by default, and there are 0.0351459 points per cm. Note that LaTeX does not use metres as a valid length.
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I would like to modify the \autoref command in the following way: if the \autoref command and the label are on the same page, it behaves like \autoref* (i.e., no hyperlink). Else, it behaves usually.
Thanks,
Vishnu
If you can use \myautoref instead of \autoref, the following will work as you wished:
\documentclass{article}
\usepackage{lipsum}
\usepackage[pdftex,colorlinks]{hyperref}
\makeatletter
\def\my#setref#1#2#3{%
\ifx#1\relax\protect\G#refundefinedtrue
\else\expandafter#2#1\fi}
\def\pagenum#1{\expandafter\my#setref\csname
r##1\endcsname\#secondoffive{#1}}%
\def\myautoref#1{\def\refnum{\pagenum{#1}}%
\ifnum\refnum=\thepage\relax\autoref*{#1}%
\else\autoref{#1}\fi}
\makeatother
\begin{document}
\section{First}\label{first}
\lipsum[1-3]
\myautoref{first}
\lipsum[4-8]
\myautoref{first}
\end{document}
I had to solve a similaire problem and found something shorter (more easy to understand for me):
\usepackage{ifthen}
\newcommand{\myautoref}[1]{
\ifthenelse%
{\equal{\pageref{#1}}{\thepage}}%
{\autoref*{#1}}%
{\autoref{#1}}
}
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How do you write a URL in Latex?
The subscripts and everything else make the font look very strange when it compiles.
You can use \url
\usepackage{hyperref}
\url{http://stackoverflow.com/}
You just need to escape characters that have special meaning: # $ % & ~ _ ^ \ { }
So
http://stack_overflow.com/~foo%20bar#link
would be
http://stack\_overflow.com/\~foo\%20bar\#link
Here is all the information you need in order to format clickable hyperlinks in LaTeX:
http://en.wikibooks.org/wiki/LaTeX/Hyperlinks
Essentially, you use the hyperref package and use the \url or \href tag depending on what you're trying to achieve.
A minimalist implementation of the \url macro that uses only Tex primitives:
\def\url#1{\expandafter\string\csname #1\endcsname}
This url absolutely won't break over lines, though; the hypperef package is better for that.